3.3. name-service の例

'use strict';

const path = require('path');
const http = require('http');
const express = require('express');
const bodyParser = require('body-parser');
const cors = require('cors');
const probe = require('kube-probe');

const app = express();
const server = http.createServer(app);

// Adds basic health-check endpoints
probe(app);

let isOn = true;
const { update, sendMessage } = require('./lib/web-socket')(server, _ => isOn);

// Send and receive json
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

// CORS support
app.use(cors());

// Name service API
app.get('/api/name', (request, response) => {
  if (isOn) {
    response.send('World!');
  } else {
    response.status(500).send('Name service down');
  }
  sendMessage(`${new Date()} ${isOn ? 'OK' : 'FAIL'}`);
});

// Current state of service
app.put('/api/state', (request, response) => {
  isOn = request.body.state === 'ok';
  response.send({ state: isOn });
  update();
});

app.get('/api/info',
  (request, response) => response.send({ state: isOn ? 'ok' : 'fail' }));

// Expose the license.html at http[s]://[host]:[port]/licenses/licenses.html
app.use('/licenses', express.static(path.join(__dirname, 'licenses')));

module.exports = server;